129 results about "Projection angle" patented technology

The invention belongs to the field of image processing, and provides a projection image automatic correction method and system based on deep learning, and the method comprises the steps: controlling a projector to output a preset test image; acquiring a first image of a user at a viewing angle by the mobile terminal; acquiring a second image at a projection angle by a shooting device of the projector; extracting features and predicting adjustment parameters for projection correction based on a projection image correction model of deep learning; the adjustment parameters are issued to the projector through a network; and performing pre-distortion processing on an image signal to be projected based on the geometric mapping parameter, and performing pixel-level adjustment of brightness and color based on the compensation parameter to generate a corrected projection output image. According to the method, the usability and accuracy of projection image correction can be improved.

The invention relates to the technical field of projection virtual-real fusion, and particularly discloses an exhibition hall virtual-real fusion interaction system based on dynamic light field projection, and the system comprises a multi-modal heterogeneous data fusion module which is used for obtaining multi-modal heterogeneous data of visitors and carrying out the fitting of the multi-modal heterogeneous data; the dynamic light field real-time rendering module is used for simulating attenuation and scattering of light in a complex medium of an exhibition hall; the millimeter-level space positioning and tracking module is used for realizing real-time positioning of the moving target according to the fused multi-modal heterogeneous data; the intelligent semantic interaction decision module is used for generating a semantic interaction instruction according to the fused multi-modal heterogeneous data and the real-time positioning result of the moving target; and the adaptive projection regulation and control module is used for adjusting the projection angle and brightness according to the semantic interaction instruction, and dynamically adjusting the light path output by the dynamic light field real-time rendering module according to the environmental parameters of the exhibition hall so as to realize fusion display. According to the invention, high-precision and intelligent virtual-real fusion interaction experience can be provided for the exhibition hall.

The invention discloses an image enhancement processing method and system for an unmanned aerial vehicle monitoring video stream, and relates to the technical field of data processing, and the method comprises the steps: responding to a triggering instruction that an unmanned aerial vehicle enters a hovering verification state, extracting a current exposure line index, and resolving a target light beam projection angle corresponding to the current exposure line index, generating a scanning driving signal based on the linkage mapping relation of the two, performing line-by-line scanning exposure, and limiting the space coverage range of the physical projection light beam in a physical space slice corresponding to a pixel line which is currently in an exposure opening state, so that environmental near-field suspended particles outside the physical space slice are kept in a non-illumination state; and collecting the optical signal reflected by the physical space slice, and generating an enhanced video frame for suppressing near-field scattering interference. According to the application, the airborne linear light source and the exposure line are synchronously scanned, and the light beam coverage range is strictly limited in the physical space slice corresponding to the current exposure line, so that the near-field dust does not generate scattered light because the near-field dust is not illuminated.

The invention provides a projection lamp shadow effect intelligent adjustment method based on artificial intelligence, and the method comprises the steps: obtaining the material type and reflection coefficient of the wall surface of each region of an exhibition space through a pre-established wall surface material database, carrying out the classification processing according to the reflection characteristics of different materials, and obtaining a material reflection distribution diagram; acquiring light intensity distribution in the space based on stray light distribution characteristics, performing gridding decomposition on the light intensity distribution, and obtaining light intensity and light field distribution uniformity of each grid area through numerical integration; according to the adjusted projection angle and light source position, generating a control parameter for the projection equipment, adjusting the output intensity and direction of the projection light source, and obtaining the light distribution intensity after the control parameter of the projection equipment is adjusted; and if the contrast ratio and the color deviation value of the detail area do not meet the preset standard, optimizing the light source control parameters through an ambient light compensation mechanism in combination with the accumulated intensity data of the space corner to obtain a light compensation result.

The application provides an irradiation angle adjusting component and an angle-adjustable lamp. The irradiation angle adjusting component comprises a support, a light source and an optical component. The light source emits light, the light is at least partially incident into the optical component, and the light is redirected and emitted out through the optical component. The light source and the optical component are arranged on the support, and at least one of the light source and the optical component can rotate and / or swing relative to the support, so as to change the light projection angle of the light emitted out by the optical component. The irradiation angle adjusting component can improve the universality on the basis of ensuring the heat dissipation effect.

The utility model belongs to the field of projector supports, and particularly relates to a liftable and rotatable data visualization projector support, which comprises a projector mounting plate and a projector fixing bolt, the projector fixing bolt is fixed in the middle of the upper surface of the projector mounting plate, and a supporting cylinder is arranged at the bottom of the projector mounting plate. A lifting rod is movably inserted into an inner cavity of the supporting cylinder. A first gear box is mounted at the top of the supporting cylinder, and a second gear box is mounted at the top of the lifting rod; triangular supporting frames are annularly arranged at the bottom of the supporting cylinder, screw holes are formed in the bottoms of the triangular supporting frames in a penetrating mode, adjusting screw rods are in threaded connection with the interiors of the screw holes, and self-locking universal wheels are rotationally connected to the bottoms of the adjusting screw rods. According to the novel projector, the height and the horizontal irradiation angle are flexibly adjusted, the worm gear and the worm are matched to achieve self-locking performance, the lifting rod and the projector mounting plate can be locked, the projector is more stable in use, and the projection angle and height of the projector are more accurately adjusted.

The application provides a quick assembly type projector, and belongs to the field of projectors, which comprises a host computer, a bottom plate and a mounting frame, the host computer comprises a machine body shell, a projection main body is movably connected to the side of the machine body shell, and heat dissipation grilles are evenly arranged on the side of the machine body shell, the design of the storage groove and the sealing cover plate enables users to conveniently store small objects such as remote controllers and prevents loss. In addition, the design of the power socket and the isolation cover plate ensures the safety of electricity use and avoids the entry of dust and sundries. Through the modular and standardized design concept, the projector realizes quick splicing and fixing between the host computer, the bottom plate and the mounting frame. Users can easily complete the assembly work of the projector without the help of professional tools, which greatly saves time and cost. Meanwhile, through the design of the adjusting motor and the steering top plate, users can conveniently adjust the projection angle and height to meet the use requirements in different scenes.

A translation scanning tomography method, device and readable storage medium, wherein the translation scanning tomography method comprises: controlling a ball tube and a detector of a digital radiographic system to move synchronously at a preset speed, controlling the digital radiographic system to expose every preset time interval, acquiring two-dimensional images collected by the detector, determining position information of each two-dimensional image according to the preset speed and the preset time interval, and obtaining a reconstructed three-dimensional image according to a projection angle of pixels in the collected two-dimensional images and the position information. The translation scanning tomography method, device and readable storage medium can reduce the complexity of the motion structure of the DR system and the high-precision requirement of the motion feedback device, and reduce the cost.

A system receives a set of two-dimensional projection images associated with respective projection angles from an imaging device. The projection images include projections of an anatomical structure, an anatomical target, and possibly fiducial markers, with a flexible elongate device disposed therein. The system can reconstruct a three-dimensional image from the set of two-dimensional projection images. In some examples, prior to reconstruction, the system can detect and repair pixels (within the projection images) associated with the fiducial markers, the flexible elongate device, and / or other objects. The system can enhance the reconstruction using a style transfer model. The system or another system can train the style transfer model by generating two-dimensional projections for a training set based on three-dimensional ground truth images.

To reduce a situation where geometric correction frequently changes unintentionally.SOLUTION: A correction method includes: when a projection angle that is an angle formed by a horizontal plane and a projection direction of a projector is an angle within a first range, applying first geometric correction for correcting distortion of an image projected on a first projection surface from the projector; when the projection angle is an angle within a second range different from the first range, applying second geometric correction for correcting distortion of an image projected, from the projector, on a second projection surface intersecting the first projection surface; when the projection angle changes from the angle within the first range to an angle within a third range that is a range between the first range and the second range, applying the first geometric correction; and when the projection angle changes from the angle within the second range to the angle within the third range, applying the second geometric correction.SELECTED DRAWING: Figure 3

This invention provides a proton imaging method and imaging device, applicable to the fields of proton imaging technology and signal processing technology, particularly in the field of particle radiation imaging technology. The method includes: determining a virtual source position based on an initial two-dimensional dose distribution of a proton beam acquired without an imaging object; obtaining multiple sub-beam propagation paths from the virtual source position to the multiple predetermined sub-beam center positions based on the virtual source position and multiple predetermined sub-beam center positions on a predetermined plane; obtaining sub-beam data pairs corresponding to the sub-beam propagation paths and the two-dimensional dose distribution based on the two-dimensional dose distribution and the lateral distribution components determined along the sub-beam propagation paths; obtaining multiple water equivalent path lengths corresponding to at least one projection angle through an iterative algorithm based on the multiple sub-beam data pairs corresponding to at least one projection angle; and performing image reconstruction based on the multiple water equivalent path lengths corresponding to at least one projection angle to obtain a target image of the imaging object.

The present disclosure provides an image reconstruction method, device, electronic equipment and storage medium, the image reconstruction method comprising: acquiring a compressed image of a detection object with respect to a projection plane; processing at least one of two-dimensional position information, texture information and depth information included in the compressed image based on a conversion relationship to obtain three-dimensional information, the conversion relationship being determined according to extreme position information of the two-dimensional position information with respect to the projection plane or a projection angle of the two-dimensional position information with respect to the projection plane; and generating point cloud data of the detection object according to a plurality of three-dimensional information.

The invention relates to a geometric parameter estimation method for cone-beam CT, belongs to the technical field of cone-beam computed tomography, and solves the problems of high cost and low efficiency of a technical scheme for determining geometric parameters of cone-beam CT in the prior art. The geometric parameter estimation method comprises the following steps: extracting same preset sampling lines from projection images at all projection angles to obtain sinograms corresponding to all the preset sampling lines; determining a first transverse offset of each preset sampling line according to the sinogram corresponding to each preset sampling line, and performing linear fitting based on the first transverse offset of each preset sampling line to obtain a torsion angle of the cone beam CT; and performing rotation correction on the projection images at each projection angle by using the torsion angle of the cone beam CT, extracting a sinogram corresponding to the center line from the projection images at each projection angle after rotation correction, and taking the transverse offset of the center line as the transverse offset estimation value of the cone beam CT. And the geometric parameters of the cone beam CT can be quickly estimated.

The utility model discloses a projector horizontal fixing device which comprises a fixing mechanism, the bottom end of the fixing mechanism is connected with a horizontal adjusting mechanism, and the bottom end of the horizontal adjusting mechanism is connected with a supporting and positioning mechanism. According to the utility model, the distance between the front surface of the fixed disc and the projection wall surface is sensed in an infrared manner through two infrared sensors fixed on one side of the fixed disc, and the output end of a second motor fixed at the bottom end of a connecting frame drives an adjusting gear to rotate, so that an adjusting gear ring drives the fixed disc to rotate along a supporting disc; the fixing disc drives the projector to adjust and rotate to directly face the projection wall, the positioning gear ring meshed with the outer wall of the tooth surface of the positioning gear drives the supporting disc to rotate, the supporting disc drives the fixing disc to adjust the angle, the angle of the projector can be conveniently adjusted to the horizontal position, and the projection level rate of the projector is increased; the projection angle influence problem caused by a special environment or an outdoor environment is avoided.

The utility model discloses a kind of suspension type multidimensional adjustable projectors, including projector and inverted recess type frame, the middle part of the outer surface of the front end of projector is provided with lens, the middle part of the outer surface of inverted recess type frame upper end is installed with projection direction adjusting assembly, the side of projection direction adjusting assembly is provided with dustproof structure, the bottom of the outer surface of inverted recess type frame right side is installed with projection angle adjusting assembly, the middle part of the outer surface of projector left end is fixedly installed with first driven shaft, and the first driven shaft is connected with inverted recess type frame left lower portion. The utility model is projected by the projection angle adjusting assembly of being set, the angle of projector is conveniently adjusted, the projection direction adjusting assembly of being set is conveniently adjusted, the direction of projector is projected, the dustproof structure of being set is conveniently protected lens when projector is not used, reduce the accumulation of dust.

The invention provides an image correction method and a double-projection imaging system, and relates to the technical field of images, in particular to the technical field of image correction. According to the method, a first projection image and a second projection image of a target object under a target projection angle can be acquired, scattering correction is performed on the first projection image, and a corrected image under the target projection angle is determined based on the first projection image after scattering correction and the second projection image of the target object under the target projection angle. Wherein the target projection angle is a projection angle within a target projection angle range, the first projection image comprises a shadow area formed after shielding of the first BSA, and the target projection angle range is a projection angle range where the first projection group and the second projection group are overlapped. According to the method, the phenomenon of shielding artifacts of the image in the reconstruction process can be effectively reduced.

1. The name of this design product: the main body of the beam projector. 2. Purpose of this product: This product and its main body are used for light beam projection. It can move autonomously and its projection angle can be adjusted within the range of 0-90 degrees. 3. The key design point of this design product is the shape of the part represented by the solid line. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1. 5. Other circumstances that require explanation Other explanations: This design is a partial design, in which the parts indicated by the dotted lines in each view do not fall within the scope of protection required; the part indicated by the number A in the three-dimensional figure 1 is transparent.

In the disclosure, a marker projection device (100) for use in an augmented-reality system is described. The marker projection device (100) comprises a control unit that receives depth information data indicative of distances to surfaces (202A-C, 204, 206) in the environment of the marker projection device (100) and a marker image indicative of a visual appearance of a fiducial marker. Furthermore, the control unit is configured: to identify one or more potential projection surfaces (202A-C, 204, 206) in the environment using the depth information data; to select one (202B) of the one or more potential projection surfaces; to determine a projection angle (220A, 220B) for the selected projection surface; and to generate, using the depth information data and the projection angle for the selected projection surface, a projection image comprising an adapted marker image, wherein the control unit is configured to generate the adapted marker image by transforming the marker image such that geometrical proportions of the visual appearance of the fiducial marker are preserved when projected on the selected projection surface (202B). In addition, the marker projection device (100) comprises an optical projection unit that receives the projection image and is configured to generate a light projection according to the projection image.

A system and method includes identifying a first plurality of projection images of an object acquired by an imaging system, each of the first projection images associated with a respective one of a plurality of projection angles; reconstructing a three-dimensional image of the object based on the first projection image; forward-projecting the three-dimensional image at the plurality of projection angles to generate second projection images, each of the second projection images being associated with a respective one of the projection angles; determining a first CDF image for a first projection angle in the projection angles based on a first projection image in the first projection images and a second projection image in the second projection images; determining a pixel corresponding to the difference in the first CDF image; and combining the determined pixels with the first one of the first projection images to generate a first combined image.

The application relates to a method, device and medium suitable for multi-energy cone beam CT projection interpolation completion. The method comprises the following steps: acquiring low-energy projection and high-energy projection of a multi-energy cone beam CT energy spectrum imaging system; performing preliminary iterative sparse reconstruction and material decomposition on the low-energy projection and the high-energy projection respectively to obtain a base material one reconstructed image and a base material two reconstructed image; performing an image enhancement operation on the base material one reconstructed image and the base material two reconstructed image respectively, then performing forward projection, and performing weighted processing by using pre-calibrated high-low energy spectrum information to obtain low-energy complete projection data and high-energy complete projection data under full viewing angle. Therefore, the image domain sparse reconstructed image is used to guide the projection domain high-low energy projection data to perform energy spectrum interpolation completion, the problem of inconsistent high-low energy projection angles of a fast kilovoltage switching energy spectrum CBCT is solved, and the image quality and material decomposition accuracy are greatly improved.

A depth data measuring head (600, 700) comprising: a structured light projection apparatus (110, 610, 710) used for projecting, under the drive of a driving apparatus (114, 314) and at different projection angles, a beam having a texture to a measured space so as to form different textures on an object to be measured; and first and second image sensors (620, 630; 720, 730) that are respectively arranged on both sides of the structured light projection apparatus (110, 610, 710), the first and second image sensors having a predetermined relative spatial position relationship and imaging the measured space at least twice so as to obtain at least two sets of images having different texture distributions, wherein the at least two sets of images are used for obtaining single-measurement depth data of the object to be measured. The structured light projection apparatus (110, 610, 710) that reflects, at different angles, structured light generated by a light source module (I) is used, so that rapid, economical and low-failure-rate multi-pattern projection is implemented. Furthermore, the structured light projection apparatus (110, 610, 710) matches multiple pairs of binocular sensors (723, 724; 733, 734) sharing a light path, thereby further shortening the frame interval and improving the quality of depth fusion data. Also disclosed is a depth data computing device and measurement method.

The application discloses a surface imaging method, a storage medium and equipment, wherein the method comprises the following steps: acquiring an initial projection angle of a projection component, acquiring a projection angle set containing at least two projection angles based on the initial projection angle, acquiring an actual modulation amplitude distribution corresponding to each projection angle in the projection angle set and an expected modulation amplitude distribution corresponding to each projection angle for a reference plane, acquiring a modulation amplitude difference value corresponding to each projection angle, acquiring a minimum difference value in the modulation amplitude difference values corresponding to each projection angle, determining a projection angle corresponding to the minimum difference value as an expected projection angle, adjusting the projection component to the expected projection angle, projecting a grating fringe on a to-be-measured object on the reference plane by using the projection component, and performing surface imaging processing on the to-be-measured object by using a camera component. By using the application, the fringe contrast of the grating fringe projected at the expected projection angle is higher, so that the obtained object surface imaging is clearer.

The invention relates to a scanning dose adaptive modulation method and device, electronic equipment and a readable medium, and the method comprises the steps: carrying out the normal position positioning phase scanning of a scanning object, and obtaining a positioning phase image of a scanning region; determining the equivalent diameter of each Z position in the Z direction according to the positioning phase image, and integrating each equivalent diameter into an equivalent diameter sequence; the number of scanning turns is obtained, the equivalent diameter sequence is averagely segmented according to the number of scanning turns, and the average equivalent diameter of each turn is obtained; substituting each average equivalent diameter into a gear-scanning dose modulation formula to obtain each dose control parameter, and generating a Z-direction dose modulation curve according to each dose control parameter; and correcting the Z-direction dose modulation curve along the XY plane based on the attenuation intensity of each projection angle so as to adaptively modulate the scanning dose of the scanning object through the corrected Z-direction dose modulation curve. The problem that the noise uniformity is poor in the Z-axis direction and at different scanning angles during CT dose modulation is solved.

The utility model discloses a projector support link rotation device, including projector shell (7) and base support (4), base support (4) rotates and is installed on projector shell (7), is used for the bottom support of projector shell (7), projector shell (7) can be adjusted to any projection angle relative to base support (4);Base support (4) with between projector shell (7) is provided with pivot piece (5), pivot piece (5) passes through projector shell (7) with base support (4), and is locked with its through a rotation -stopping nut (1). The utility model can realize the adjustment of any angle of up and down direction, and through the design of wear -resisting friction piece and rotation -stopping nut has strengthened the service life and stability of device, and simultaneously, the device structure is relatively simple, and the installation and operation are more convenient.

The utility model relates to the technical field of vertical projectors, and discloses a pen point writing angle vertical projector, which comprises a U-shaped supporting plate, a drawer box, a mounting frame and a projector main body, the outer side of the drawer box is sleeved with a U-shaped supporting plate, a supporting vertical plate is installed on one side of the top end of the U-shaped supporting plate through bolts, a horizontal plate is welded to one side of the top end of the supporting vertical plate, a U-shaped block is welded to the other end of the horizontal plate, a rotating block is installed in the U-shaped block through a damping rotating shaft, and a mounting frame is installed at one end of the rotating block through a mounting groove. Locking bolts are mounted on the two sides of the mounting frame through screw holes, and one end of the inner side of each locking bolt is connected with a clamping plate through a bearing. According to the pen point writing angle vertical projector, the projector body can be conveniently installed and detached, the projection angle of the projector body is adjusted to achieve synchronous display of a projection picture and a computer screen, explanation and observation are facilitated, and a proper writing angle can be found.

A region-of-interest extraction method and an apparatus, and a device, a system and a storage medium are provided. The region-of-interest extraction method is applied to an X-ray imaging system. The X-ray imaging system includes a detector and an array X-ray source, the array X-ray source includes a plurality of X-ray sources having different projection angles, and imaging regions corresponding to the plurality of X-ray sources are formed on the detector. The method includes: acquiring geometric position parameters corresponding to the plurality of X-ray sources; grouping the plurality of X-ray sources according to the geometric position parameters of the plurality of X-ray sources, determining at least one X-ray source group, and imaging regions of X-ray sources in the same X-ray source group not overlapping with each other; combining the imaging regions of the X-ray sources in each of the at least one X-ray source group, so as to determine a combined imaging region corresponding to each of the at least one X-ray source group; and performing region-of-interest extraction on projection data in the combined imaging region corresponding to each of the at least one X-ray source group.

The invention discloses a bending degree testing method and device for glasses, electronic equipment and a medium, and the method comprises the steps: obtaining projection information of the glasses under a set opening degree; wherein the set opening degree comprises at least three opening degrees, and the projection information comprises projection length information and projection angle information of the glasses; according to the projection length information, determining whether the projection length information satisfies a preset condition; and under the condition that the projection length information meets the preset condition, taking the projection angle information as a bending degree test result of the glasses.

The invention relates to an image reconstruction method based on a projection image, belongs to the technical field of cone beam computed tomography, and solves the problem of low quality of a target reconstruction image caused by the change of CBCT parameters in the prior art. The image reconstruction method comprises the following steps: acquiring projection images of a target object at each projection angle by using CBCT, and determining object areas of the projection images of the target object at each projection angle by using an edge detection method; estimating CBCT parameters according to the object areas of the projection images of the target object at each projection angle to obtain a torsion angle and a transverse offset of the CBCT; and reconstructing the target object by combining the projection images of the target object at each projection angle according to the torsion angle and the transverse offset of the CBCT to obtain a target reconstruction image. And the image precision of target object reconstruction by using CBCT is improved.

Embodiments of the present application provide a 3D camera and a debugging method and device, a storage medium and a program product. An industrial computer acquires a point cloud diagram collected by a laser line scanning structured light camera (3D camera) based on a current laser projection angle and a corresponding depth diagram. In response to a laser debugging operation, the industrial computer determines a target laser projection angle according to a to-be-debugged position marked in the depth diagram and camera calibration parameters, sends control information including the target laser projection angle to the laser line scanning structured light camera to control the laser line scanning structured light camera to project a laser line based on the target laser projection angle, so that the laser line can cover the to-be-debugged position, and the point cloud imaging effect of an area where the to-be-debugged position is located can be accurately improved. The user does not need to manually and repeatedly adjust camera parameters, the efficiency and accuracy of 3D camera debugging can be improved, and thus the point cloud imaging effect is improved.